Home / 27,720.75-38,254.64-15,145.59

Finding the Fourth Proportional to 27,720.75, 38,254.64 and 15,145.59

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Solution

The fourth proportional to 27,720.75, 38,254.64 and 15,145.59 is: 20,900.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720.75 : 38,254.64 = 15,145.59 : x
  2. Step 2: Convert to fraction form
    27,720.75/38,254.64 = 15,145.59/x
  3. Step 3: Cross multiply
    27,720.75x = 38,254.64 × 15,145.59
  4. Step 4: Simplify right side
    27,720.75x = 579,389,017.31
  5. Step 5: Solve for x
    x = 579,389,017.31/27,720.75
  6. Step 6: Final answer
    x = 20,900.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.